<template>
	<view class="goods-list">
		<view v-for="(item,i) in goodsList" :key="i" @click="gotoDetail(item)">
			<my-goods :goods="item"></my-goods>
		</view>
	</view>
</template>

<script>
	export default {
		data() {
			return {
				queryObj: {
					query: '',
					cid: '',
					pagenum: 1,
					pagesize: 10,
					// 是否正在请求数据
					isloading: false
				},
				// 商品列表
				goodsList: [],
				total: 0,
				// 默认图片
				defaultPic:  'https://img3.doubanio.com/f/movie/8dd0c794499fe925ae2ae89ee30cd225750457b4/pics/movie/celebrity-default-medium.png'
			};
		},
		onLoad(options) {
			// console.log(options)
			 // 将页面参数保存到 this.queryObj 对象中
			this.queryObj.query = options.query || ''
			this.queryObj.cid = options.cid || ''
			this.getGoodsList()
		},
		methods: {
			// 获取商品列表数据
			async getGoodsList(cb) {
				// 打开节流阀
				this.isloading = true
				// 发送请求
				const {data: res} = await uni.$http.get('/goods/search', this.queryObj)
				// console.log(res)
				// 只要数据请求完毕，就立即按需调用 cb 回调函数
				cb && cb()
				if (res.meta.status !== 200) return uni.$showMsg()
				// console.log(res)
				// 关闭节流
				this.isloading = false
				// 展开运算符，进行新旧数据的拼接
				this.goodsList = [...this.goodsList, ...res.message.goods]
				this.total = res.message.total
				
			},
			// 点击跳转商品详情页面
			gotoDetail(goods) {
				uni.navigateTo({
				    url: '/subpkg/goods_detail/goods_detail?goods_id=' + goods.goods_id
				})
			}
		},
		// 触底事件
		onReachBottom() {
			// 判断是否还有下一页数据
			if(this.queryObj.pagenum * this.queryObj.pagesize >= this.total) return uni.$showMsg('数据加载完毕！')
			// if(this.goodsList.length = this.total) return uni.$showMsg('数据加载完毕')
			// 判断是否正在请求其他数据， 是 则不发起额外的请求
			if (this.isloading) return
			this.queryObj.pagenum += 1
			this.getGoodsList()
		},
		// 下拉刷新事件
		onPullDownRefresh() {
			// 1.重置关键数据
			this.queryObj.pagenum = 1
			this.total = 0
			this.isloading = false
			this.goodsList = []
			// 2.重新发起请求
			this.getGoodsList(() => uni.stopPullDownRefresh())
		},
		
	}
</script>

<style lang="scss">
.goods-list {
	border: 1rpx solid #efefef;
	margin: 0 8rpx;
	
}
</style>
